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<TITLE>JavaScript Source Code 3000:  Messages:  Favorite Banner</TITLE>
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<META NAME="description" CONTENT="Display banners while controlling how often they appear.  Great for displaying a preferred banner over others!">
<META NAME="date" CONTENT="2000-12-06">
<META NAME="channel" CONTENT="Web Developer">
<META NAME="author" CONTENT="Rich Galichon">
<META NAME="section" CONTENT="Messages">
<SCRIPT LANGUAGE="JavaScript">
<!-- Original:  Rich Galichon (rich@galichon.net) -->
<!-- Web Site:  http://www.galichon.net -->




<!-- Begin
function banner(imgSource,url,alt,chance) {
this.imgSource = imgSource;
this.url = url;
this.alt = alt;
this.chance = chance;
}
function dispBanner() {
with (this) document.write("<A HREF=" + url + "><IMG SRC='" + imgSource + "' WIDTH=468 HEIGHT=60 BORDER=0 ALT='" + alt + "'></A>");
}
banner.prototype.dispBanner = dispBanner;
banners = new Array();
banners[0] = new banner("http://www.galichon.net/images/banner/galichon_logo.jpg",
                        "http://www.galichon.net target='_blank'",
                        "Galichon Enterprises",
                        10);
banners[1] = new banner("http://imageserv.imgis.com/images/Ad13700St1Sz1Sq1_Ban1.gif",
                        "http://www.banner1-url-here.com target='_blank'",
                        "Description Here",
                        30);
banners[2] = new banner("http://imageserv.imgis.com/images/Ad13189St1Sz1Sq5_Ban10.gif",
                        "http://www.banner2-url-here.com target='_blank'",
                        "Description Here",
                        20);
///////////////////////////////////////////////////
// banners[x] = new banner(<banner source image>,                                           //                         <url to link to when the banner is clicked>,                     //                         <alt>                                                            //                         <the chance this banner has in which to be randomly selected>);  
// To increase the chance of a banner being randomly selected, increase it's corresponding  // 'chance' property relative to the other banners.                                         
///////////////////////////////////////////////////
sum_of_all_chances = 0;
for (i = 0; i < banners.length; i++) {
sum_of_all_chances += banners[i].chance;
}
function randomBanner() {
chance_limit = 0;
randomly_selected_chance = Math.round((sum_of_all_chances - 1) * Math.random()) + 1;
for (i = 0; i < banners.length; i++) {
chance_limit += banners[i].chance;
if (randomly_selected_chance <= chance_limit) {
document.write("<A HREF=" + banners[i].url + "><IMG SRC='" + banners[i].imgSource + "' WIDTH=468 HEIGHT=60 BORDER=0 ALT='" + banners[i].alt + "'></A>");
return banners[i];
break;
      }
   }
}
//  End -->
</script>

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<FONT COLOR="#006666"><b>Favorite Banner</b></font></font>
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<!-- Description --><!--content_start-->
Display banners while controlling how often they appear.  Great for displaying a preferred banner over others!
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<!-- Demonstration -->
<SCRIPT LANGUAGE="JavaScript">




<!-- Begin
this_banner = randomBanner();
document.write("<br><br>This banner had a " + (this_banner.chance / sum_of_all_chances) * 100 + "% chance of being displayed");  // This line may be removed
//  End -->
</script>
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<a name="source">
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<tr><td BGCOLOR=yellow><font FACE="helvetica,arial,geneva"><b>JavaScript Source Code 3000:  Messages:  Favorite Banner</b>
<p>Simply click inside the window below, use your cursor to highlight the script, and copy (type Control-c or Apple-c) the script into a new file in your text editor (such as Note Pad or Simple Text) and save (Control-s or Command-s).  The script is yours!!!
<br><br></font></td></tr>
<tr><td BGCOLOR=yellow ALIGN=CENTER>
<form NAME="copy">

<DIV align="center">
<input type=button value="Highlight All" onClick="javascript:this.form.txt.focus();this.form.txt.select();">&nbsp;&nbsp;&nbsp;&nbsp;
<INPUT TYPE="text" NAME="total" VALUE="Script Size:  3.48 KB" size=24>
</DIV>

<textarea NAME="txt" ROWS=20 COLS=75 WRAP=VIRTUAL>

&lt;!-- TWO STEPS TO INSTALL FAVORITE BANNER:

  1.  Copy the coding into the HEAD of your HTML document
  2.  Add the last code into the BODY of your HTML document  --&gt;

&lt;!-- STEP ONE: Paste this code into the HEAD of your HTML document  --&gt;

&lt;HEAD&gt;

&lt;SCRIPT LANGUAGE="JavaScript"&gt;
&lt;!-- Original:  Rich Galichon (rich@galichon.net) --&gt;
&lt;!-- Web Site:  http://www.galichon.net --&gt;

&lt;! &gt;
&lt;! &gt;

&lt;!-- Begin
function banner(imgSource,url,alt,chance) {
this.imgSource = imgSource;
this.url = url;
this.alt = alt;
this.chance = chance;
}
function dispBanner() {
with (this) document.write("&lt;A HREF=" + url + "&gt;&lt;IMG SRC='" + imgSource + "' WIDTH=468 HEIGHT=60 BORDER=0 ALT='" + alt + "'&gt;&lt;/A&gt;");
}
banner.prototype.dispBanner = dispBanner;
banners = new Array();
banners[0] = new banner("http://www.galichon.net/images/banner/galichon_logo.jpg",
                        "http://www.galichon.net target='_blank'",
                        "Galichon Enterprises",
                        10);
banners[1] = new banner("http://imageserv.imgis.com/images/Ad13700St1Sz1Sq1_Ban1.gif",
                        "http://www.banner1-url-here.com target='_blank'",
                        "Description Here",
                        30);
banners[2] = new banner("http://imageserv.imgis.com/images/Ad13189St1Sz1Sq5_Ban10.gif",
                        "http://www.banner2-url-here.com target='_blank'",
                        "Description Here",
                        20);
///////////////////////////////////////////////////
// banners[x] = new banner(&lt;banner source image&gt;,                                           //                         &lt;url to link to when the banner is clicked&gt;,                     //                         &lt;alt&gt;                                                            //                         &lt;the chance this banner has in which to be randomly selected&gt;);  
// To increase the chance of a banner being randomly selected, increase it's corresponding  // 'chance' property relative to the other banners.                                         
///////////////////////////////////////////////////
sum_of_all_chances = 0;
for (i = 0; i &lt; banners.length; i++) {
sum_of_all_chances += banners[i].chance;
}
function randomBanner() {
chance_limit = 0;
randomly_selected_chance = Math.round((sum_of_all_chances - 1) * Math.random()) + 1;
for (i = 0; i &lt; banners.length; i++) {
chance_limit += banners[i].chance;
if (randomly_selected_chance &lt;= chance_limit) {
document.write("&lt;A HREF=" + banners[i].url + "&gt;&lt;IMG SRC='" + banners[i].imgSource + "' WIDTH=468 HEIGHT=60 BORDER=0 ALT='" + banners[i].alt + "'&gt;&lt;/A&gt;");
return banners[i];
break;
      }
   }
}
//  End --&gt;
&lt;/script&gt;

&lt;/HEAD&gt;

&lt;!-- STEP TWO: Copy this code into the BODY of your HTML document  --&gt;

&lt;BODY&gt;

&lt;SCRIPT LANGUAGE="JavaScript"&gt;

&lt;! &gt;
&lt;! &gt;

&lt;!-- Begin
this_banner = randomBanner();
document.write("&lt;br&gt;&lt;br&gt;This banner had a " + (this_banner.chance / sum_of_all_chances) * 100 + "% chance of being displayed");  // This line may be removed
//  End --&gt;
&lt;/script&gt;

 

&lt;!-- Script Size:  3.48 KB --&gt;</textarea><br><font FACE="helvetica,arial,geneva"></font></td></tr>

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